Bread slicing machine sharpening means



Aug. 29, 1961 H. E. BOITSCHA 2,997,826

BREAD SLICING MACHINE SHARPENING MEANS Filed April 7, 1960 4Sheets-Sheet 1 INVENTOR Herbert E. lyi'itscha BY Y M ATTORNEYS Aug. 29,1961 H. E. BOITSCHA BREAD SLICING MACHINE SHARPENING MEANS 4Sheets-Sheet 2 Filed April 7, 1960 INVENTOR Herbert E. Boi/tscha BY -w//b ATTORNEYS Aug. 29, 1961 H. E. BOITSCHA BREAD SLICING MACHINESHARPENING MEANS 4 Sheets-Sheet 3 Filed April 7, 1960 INVENTOR HerbertE.Boitscha,

ATTORNEYS Aug. 29, 1961 H. E. BOITSCHA BREAD SLICING MACHINE SHARPENINGMEANS 4 Sheets-Sheet 4 Filed April 7, 1960 INVENTOR Herbert .E.BoitschaBY i144 V7 ATTORNEYS 2,997,826 i i BREAD SLICING MACHINE SHARPENINGMEANS Herbert E. Boitscha, Bettendorf, Iowa, assignor to BettendorfBakery Equipment Co., Bettendorf, Iowa, a corporation of Iowa Filed Apr.7, 1960, Ser. No. 20,748 10 Claims. (Cl. 51-249) constitute a series ofloops in surrounding relationship with each of the drums or rolls.

The invention contemplates the provision of a pair of cylindricalabrading members in association with the base frame of a bread slicingmachine of the endless band type with one of such cylindrical abradingmembers being mounted for movement into and out of abrading engage.

ment with one side of one edge of each of the endless bands, with theloops formed by such bands-"being in surrounding relationship with suchcylindrical abrading member. The other of the cylindrical abradingmembers is mounted for movement into and out of abrading engagement withthe same edge of the-band s but on the opposite side of such same edge,and such other cylindrical abrading member is not surrounded by theloops formed by such bands but rather is excluded by such loops.

Endless blade band machines of the type to which the invention relateshave been providedin which disassembly of the machines or completeremoval of the drumsunder which the blade band pass is not required. Anobject of the present invention is to provide for the sharpening of theendless bands in such machines on both sides of the cutting edge of eachband by cylindrical abrading members mounted for movement into and outof abrading engagement as stated above. Since the two cylindricalabrading members must respectively engage opposite sides of the cuttingedge of each band, the topological relation ship between the bands andabrading members is suchthat one of the abrading members must beincluded within tlie loops formed by the bands, although the otherabrading member is excluded from the loops. The present inventionprovides for association of a pair of such abrading members with anendless blade band slicing machine in such a manner that blades may beremoved from the machine without interference even with theloop-included cylindrical abrading member, whereby the band blades maybe removed for repair or replacement without disassembling or removingany of the sharpening apparatus associated with the machine. This is ofadvantage as compared to the most closely related apparatus of the priorart because thepresent invention eliminates any necessity for removaland subsequent re-installation of the sharpening apparatus. Also thepresent invention elimif nates the necessity for subsequent recheckingand re'-ad justment of the re-installed sharpening apparatus."

It has previously been proposed to mount'a series or pair of abradingmembers in an endless band blade slicing machine for movement into andout of sharpening association with the cutting edge of the band bladesand to pro vide for reciprocating motion of the abrading members whilein sharpening contact with the blades. An object of the presentinvention is to accomplish the engagement and disengagement of theabrading members together with the reciprocating motion of such membersby an improved 7 bands each having a cutting edge 16 (3, 8).

2,997,826 Patented Aug. 29,

Ice

tained in each sharpener assembly associated with each abrading member.More particularly an object of the invention is to provide for mountingof the abrading member of a sharpener 5 assembly so that oscillatorymotion of the abrading member into and out of contact with the bandblades is the function of the reciprocating motion of the abradingmember back and forth transversely of the array of band blades so thatas each abrading member is reciprocated it brings itself into engagementwith the blades to be drawn thereacross in sharpening relationshiptherewith and then removes itself from such contact, all this beingaccomplished by means which are self-contained in each sharpenerassembly so that the mechanical operations of the two sharpenerassemblies are independent from each other. These and other objects andadvantages of the invention will be more fully understood from thefollowing description of an example of the invention as employed in thecurrently widely used 180-degree twist type of slicing machine.

In the drawings: FIGURE 1 is a side elevation of a band blade breadslicing machine in which the invention is employed. 1

FIGURE 2 is an enlarged view showing the upper right portion ofFIGURE 1. i FIGURE 3 is a fragmentary view on a greatly enlarged scaletaken from the plane of line 3-3 in FIGURE '2. FIGURE 4 is a view of oneof the sharpener assemblies taken from the plane of line 4-4 in FIGURE2. j FIGURE 5 is a view taken from the plane of line 5- 5 in FIGURE 4.FIGURE 6 is a view taken from the plane of line 6-6 in FIGURE 5. FIGURE7 is a view taken from the plane of line 7=-7 in FIGURE 5. I p FIGURE 8is a view taken from the plane of line 8 '-.8 in FIGURE'Z. FIGURE 9 is aview similar to the lower right hand portion of FIGURE 8 showing theparts in an alternate position. FIGURE 10 is a view taken from the planeof line 10--10 in FIGURE 4. FIGURE 11 is a view similar to FIGURE 10showing 5 the parts in an alternate position.

FIGURE 12 is a view taken from the plane of line -12-1'2'in- FIGURE 11.'5

FIGURE 13 is a schematic illustration of a control system for theillustrated sharpening apparatus.

In order to facilitate and condense description of the invention, thefollowing discussion of the drawings will specify reference numerals forthe various parts and'i'li' parentheses will specify by number thefigure or figures of the drawings in which such reference numerals maymost readily be found. For example, abrading member 50 (.24, 8, 10, ll)signifies that the particular part referred to is given the referencenumeral 50 and is to be conveniently found in FIGURES 2, 3, 4, 8, 10 and11.

The base frame of the apparatus illustrated in the drawings is indicatedgenerally by the reference numeral '10 (1, 2, 8, 9). First and secondspaced apart rotatable drums 11 (1, 2, 8, 9) and 12 (l) are carried bythe frame 10. '1 Endless slicing blades 15 (l-3, 8, 9) turn on and reachbetween the first and second drums 10 and 11, the slicing The slicingbands 15 each have first and second reaches, both of which extend from aposition in contact with and tangent to the first drum 11 to a positionin contact with and tangent to the second drum 12. In the illustratedexh ample, each of the first and second reaches has a twist of andsimplified mechanical arrangement which is: self-con 180 .degreestherein. The .endless bands 15 therefor 3 constitute a series of twistedloops in surrounding rela-. tionship with each of the rolls 11 and 12.

In the illustrated apparatus the drum 11 is provided at one end with anon-rotating hub 20 (8) and isfurther provided with a bearing 21operatively located between the hub 20 and the remainder of the drum.The hub 20 has formed therein a stub-shaft-receiving socket 22. A stubshaft 23 is provided in supported relationship with the base frame 10.The stub shaft is threaded in its support and has a head portion 32which is adapted to be engaged by a wrench or crank, whereby the stubshaft may be backed out of the socket 22 and to a position of spacedrelationship with the hub 20, as shown in FIG- URE 8. Desirably the stubshaft 23 may be threadedly engaged in a screw-positioned casting 24. Thecasting 24 is adapted to be adjusted in position with respect to aslideway 25 formed in or integrally aflixed to the base frame 10, suchadjustment being effected by a framemounted adjusting screw 26. Theopposite end of the upper drum 11 may be provided with a similararrangement adapted to be raised and lowered by an adjusting screw 27.The arrangement at the right hand end of the drum 11 as viewed in FIGURE8 is similar in most respects to that at the left hand end with theexception, as shown, that the shaft 28 at the right hand endcorresponding to the shaft 23 at the left hand end need not be threadedfor backing out from its associated hub 29. The adjusting screws 26 and27 may be turned to shift the groove or sliding member 24 and itscounterpart on the opposite end of the drum 11 in order to slightlyraise or lower the drum 11 and therefore adjust blade tension .Or removeall tension. However it will be understood that through such adjustingscrews 26 the upper drum 11 is carried by the frame structure of themachine through the hubs 22 and 29. i

In the illustrated example of the invention, there are provided firstand second sharpener assemblies indicated respectively by the referencenumerals 35 (1, 2, 8) and 36 (l, 2, 4, The first and second sharpenerassemblies are identical in many respects and all of the identicalelements thereof are indicated by like reference numerals.

Each sharpener assembly 35 and 36 includes a sharpener carriagecomprising a tubular structure including a sleeve member 40 (4, 6-9) anda relatively short sleeve member 41 joined by a casting 42 (6). Thesharpener carriages are adapted to reciprocate with respect to the baseframe in a direction parallel to the axes of the band blade drums 11 and12 and are adapted to oscillate in planes normal to the axes of thedrums. To this end, each sharpener carriage receives a shaft 45 (1, 2,4-9) extending parallel to the axes of the drums 11 and 12. The shaft 45associated with the first sharpener assembly 35 extends through theloops formed by the endless blade bands 15 whereby the loops are insurrounding relationship with such shaft and, as will become clearbelow, with the sharpener carriage carried thereon. The shaft 45associated with the second sharpener assembly 36 also extends parallelto the axes of the drums 11 and 12 but extends exteriorly to the loopsformed by the band blades, so that the loops are in excludingrelationship with such shaft 45 and the sharpener carriage carriedthereon.

' At opposite ends of the tubular structure comprising the sleeves 40and 41 are a pair of end members which form part of the sharpenercarriage and which are designated by the reference numerals 48 (4) and49 (4, 5). Rotatably mounted on such members 48 and 49 is a cylindricalabrading member 50 (2-4, 8, 10, 11) which may comprise a series ofcylindrical sections 51 supported on a shaft 52 (4) which is rotatablymounted in bearings supported in the members 48 and 49. It will thus beseen that the cylindrical abrading member 50 is mounted on a sharpenercarriage and reciprocates and oscillates bodily with the sharpenercarriage. The reciprocation occurs lengthwise along the direction of theshaft 45 and therefore parallel to the axes of the blade drums 11 and12. The oscillation occurs around the axis of the shaft 45. Suchoscillatory movement of each abrading member 50 bodily with itssharpener carriage about its associated shaft 45 accomplishes movementof the abrading member 50 into and out of engagement with one side ofone edge of the blade bands 15, as illustrated perhaps most clearly inFIGURE 2 where each of the abrading members 50 is shown inblade-engaging position and in which the position of each abradingmember when it is lifted out of engagement with the blade bands is alsoindicated in phantom view.

Reciprocating-drive-linkage means is provided for reciprocating eachsharpener carriage back and forth along its associated shaft 45. Suchreciprocating-drive-linkage means comprises a shaft 5 (6, 9) rotatablycarried in the body of casting 42. Fixed at an end of the shaft 58 is atravel cam 59 which drivingly engages the guide plates 60 and 61 whichare fixed to the shaft 45. The shaft 45 is fixed to the frame 10. Itwill therefore be apparent that as the shaft 48 rotates, the travel cam59 is contained between the guide plates 60 and 61 causing the sharpenercarriage including the sleeves 40 and 41 and the body 42 therebetweenand also the end members 48 and 49 and the abrading member 50therebetween to reciprocate transversely of the plates, one back andforth reciprocation being completed for each rotation of the shaft 58.

A motor 63 (l, 2, 4, 5, 7) is provided on each of the sharpenerassemblies in driving association with the cylindrical abrading member50 for powering its rotation. This drive is accomplished through thebelt 65 (4, 5), a suitable sheave 66 (4, 5) being provided inassociation with the shaft 52 of the abrading member 59. The motor 63 isalso in driving association with the carriage reciprocating linkagedescribed above, since the motor shaft 67 (6, 7) is linked through aWorm to a gear 63 keyed to the shaft 58.

According to the invention camming means is provided for imposing theoscillatory motion of the abrading memher about the associated shaft 45as a function of the reciprocating motion of the abrading member backand forth parallel to the shaft 45. For each sharpener assembly, suchcamming means comprises a cam plate 70 (4, 10-12) tied to a block 71which, in turn, is rigidly fixed to the shaft 45, and a cam followerwheel 73 which is mounted on the member 48. As may be seen most clearlyin FIGURE 2, the relationship of the parts is such that the relativelygreat weight of the abrading member 50 and .its associated shaft tendsto move the sharpener carriage asociated with each sharpener assembly 35and 36 in the clockwise direction as viewed in FIGURE 2 to therebyengage the abrading members 50 with the blades 15. When the blades areengaged, the cam 70 and cam follower 73 have the relationship shown inFIGURE 10, and the sharpener carriage as a whole is in the positionshown in FIGURE 8. When the associated sharpener carriage isreciprocated to the opposite extreme from that shown in FIGURES 8 and10, the relationship of the parts is that illustrated in FIGURES 9 and11. Engagement of the cam follower wheel 73 with the camming surface 75during such reciprocating motion from right to left, as viewed inFIGURES 8-11, causes the carriages to move in the counterclockwisedirection as viewed in FIGURE 2. This removes the abrading members '0from engagement with the blades 15. Blade-engaging positioncorresponding to FIGURES 8 and 10 is shown in phantom lines in FIGURE 12and the fully raised position corresponding to FIGURES 9 and 11 is shownin solid lines in FIGURE 12.

It will thus be seen that in at least one point during the full range ofreciprocatory travel of each abrading member, it is inblade-disengagingoscillatory position. Such at least one point at which the abradingmember is in blade-disengaging oscillatory position is at one end of thereciprocatory travel of the abrading member.-

3 The means mounting the sharpener carriage associated with the firstsharpener assembly 35 includes first and second bracket members 81 and82 (2, 8). The means mounting the sharpener carriage associated with thesecond sharpener assembly 36 includes third and fourth bracket members83 (4) and 84 (2, 4).

The first bracket member 81 includes one end portion 86 which defines asocket or bore for receiving its associated shaft 45 and includesanother end portion 87 which defines a bore for receiving the hub 20.The end portions 86 and 87 are displaced from each other with respect tothe axial direction of the drum 11 and are also displaced from eachother in a direction normal to such axis, that is in a radial directionwith respect to the drum 11. The end portions 86 and 87 are joined by anintermediate arm portion 88.

It will be understood that the first bracket member 81 ties itsassociated end of the shaft 45 to the base frame 10 solely through thehub 20 so that upon removal of the stub shaft 23 from thestub-shaft-receivin-g socket of the hub 20 the blades 15 may be removedfrom the rolls or drums without demounting the bracket members. This is.accomplished by bringing the blades 15 off the end of the drum 11 andthen between the frame structure 10 and the left end of the roll 11downwardly past the now-retracted stub shaft 23 and outwardlyimmediately above the intermediate arm portion 88.

. The second bracket member 82 may be fixed to the casting 30 (2, 8)which corresponds to the casting 24 and which is rigidly supported onthe frame assembly 10 and; tied. thereto through the adjusting screws 27whereby the shaft 45 associated with the first sharpener assembly 35,and the sharpener carriage which ,is supported on such shaft 45 movesbodily slightly up and down in parallelism to the axes of the drum 11 asthe screws 26 and 27 are turned to adjust the tension of the bandblades, or to remove all tension so that the band blades may readilyslide over the drum 11 as for removal and replacement. The third andfourth bracket members 83 and 84 are simply bolted to the frame members10 as illustrated in FIGURE 2.

Near that end of each shaft 45 which is associated with the bracket 82or the bracket 84 there is provided anaxially extending finger 90 (2, 4)which is rigidly supported on a collar 91 (4) fixed to the associatedshaft 45.

Each of the brackets 82 and 84 is provided with a rigidly afiixed yokeportion 92 (2) having set screws .93 adapted to bear on opposite sidesof the associated finger 90. By tightening one set screw 93 and backingE the otherset screw 93 of each yoke 92, the angular position of theassociated shaft 45 with respect to the frame structure may be adjustedto vary the angular position of each cam plate 70 and thereby adjust thedatum oscillatory positions of the sharpener carriage structure and theabrading member carried bodily therewith.

In the illustrated structure the shaft 58 is provided at its. outer endwith a control cam '100 (6, 7) which is adapted to engage and open amicroswitch 101 (5, 7) upon each complete revolution of the shaft 58.There is also provided a solenoid 103 (4, and a spring-engaged brake104. both of which are mounted on the member 49. Actuation of thesolenoid 103 is adapted to release the brake 104 by overcoming the biasof the spring 105. Under biasing of the spring 105, the brake 104normally operates to brake rotation of the abrading members 50 and theshaft 52 and thereby to brake rotation of the motor 63.

The control arangement may be as schematically illustrated in FIGURE 13.Upon engagement of a starting button or switch 110 a circuit iscompleted through the relay 111 closing the switches 112 to energize themotor 63 and the solenoid 103 Energizing the solenoid 103 disengages thebrake and allows the motor to drive tho'structure through one cycle ofoperation. When the control cam disengages the switch 101 allowing suchswitch to close, the starting button 110 may be released and thecircuit, through the relay 111, will be maintained by the switch 101until a single rotation of the shaft-58 is completed whereupon thecontrol cam 100 will re-engage and open the switch 101 to thereby breakthe circuit through the relay 111. 'Thereupon the switch 11 2 will openand the brake 104 will be activated by the spring 105 bringing thenow-de-energized motor63 to a quick; stop. r

The switch may be of a time delay type so that when it is closed at thebeginning of a cycle to energize, the relay 111 and close the switches112,;it will not open; until a suflicient time has elapsed to allow thecam 100; to pass out of engagement with the switch 101. This allows thestarting switch 110 to be immediately released, by the operator after itis first closed to start-the cycle, without waiting for the switch 101to close. The stop switch 109 may be opened at any time tostop theapparatus in its cycle of operation, as for purposes; of adjustment orthe like. Upon opening the switch 109,; the switch 112 will open totie-energize the motor 63 and; the solenoid 103 to quickly stop theapparatus. When the switch 112 is open the apparatus will remain stoppedeven through the switch 109 may now be reclosed and the apparatus willremain stopped until the starting switch; 110 is again momentarilyclosed to energize-the relay; 111 and close the switch 112, whereuponthe apparatus continues its cycle of operation until the control cam 100opens the switch 101 to de-energize the relay 111; and open the switches112 and thereby stop the apparatus, at the conclusion of its cycle ofoperations. At such con-' clusion of such cycle of operations, 'thecam-follower wheels 73 will be in the position shown in FIGURE 11- andthe abrading members 50 will bein bladedisengag ing position. -5 Thecontrol system shown in FIGURE 13 may be, duplicated for each of theblade sharpener assemblies 3 5 and 36 or alternatively the motorandbrake solenoids of both sharpeners may be controlled from a; single set;of start and stop switches by separate relays 111 and, switch sets 112.

The illustrated control systems are adapted to be actuated manually byan operator. If desired, the operator, may be prompted to actuate thesharpening apparatus. by means entirely independent of the sharpenerapparatus; such as a red light or other visible signal or an audible,-signal or other indication that a given interval of machine; operatingtime has elapsed since the most recent sharpening operation. For breadslicing machines operating on a commercial basis, the intervals betweensharpening ofthe blades may typically be in the neighborhood of from twoto four hours. Accordingly, there may be provided a timing light adaptedto flash at the desired intervals to remind the operator to sharpen themachine. The timer; for the light may be connected to the power supplyfor; the blade sharpening machine so that the machine is; automaticallyshut down until the timer is reset by. the operator after the sharpeningoperation. Another alternative is to provide a timer for autoe maticallyclosing the start switch 110 at desired intervalsv to thereby providefor fully automatic operation ,of-the blade sharpener apparatus. Theinvention is not restricted to the slavish imitation of each and everyone of the details described above which have been set forth merely byway of example with theintent of most clearly setting forth the teachingof the,- invention. Obviously devices may be provided which change,eliminate or add certain specific structuraldetails without departingfrom the invention.

What is claimed is: 1. The combination with a base frame, first andsecond parallel spaced apart rotatable drums carried by said frame, atleast one of said drums having a non-rotating hub, a bearing betweensaid hub and the remainder 0tsaid one drum, a stub-shaft-receivingsocket formed in said hub, a stub shaft in supported association withsaid base frame, said stub shaft being received in removablerelationship in said socket, endless slicing bands turning on andreaching between said first and second drums, said slicing bands eachhaving a cutting edge and said slicing bands each having first andsecond reaches both of which extend from a position in contact with andtangent to said first drum to a position in contact with and tangent tosaid second drum, said endless bands therefor constituting a series ofloops in surrounding relationship with each of said rolls, of: a firstsharpener assembly including a sharpener carriage, means mounting saidsharpener carriage on said base frame for reciprocation in a givendirection transversely of said bands and for oscillation in planesnormal to said direction, said given direction being parallel to theaxes of said drums, a cylindrical abrading member rotatably mounted onsaid sharpener carriage for reciprocation and oscillation bodilytherewith and for rotation relative thereto about an axis parallel tosaid given diruection, said oscillatory motion of said abrading memberbodily with said sharpener carriage accomplishing movement of saidabrading member into and out of engagement with one side of one edge ofsaid bands, reciprocating-drive-linkage means for reciprocating saidsharpener carriage, motor means in driving association with saidcylindrical abrading member for powering the rotation thereof relativeto said sharpener carriage and in driving association with saidcarriage-reciprocating linkage means for actuation thereof, said meansmounting said sharpener carriage on said base frame comprising a shaftextending parallel to the axes of said drums and extending through saidloops whereby said loops are in surrounding relationship with said shaftand said sharpener carriage carried thereon, first and second bracketmembers at opposite ends of said shaft for tying said shaft to said baseframe, one of said first and second bracket members tying its associatedend of said shaft to said base frame solely through said hub wherebyupon removal of said stub shaft from said stub-shaft-receiving socket ofsaid hub said blades may be removed from said rolls without demountingof said bracket members, shaft and sharpener carriage, and a secondsharpener assembly including a second cylindrical abrading member withwhich said loops are in excluding relationship, said second abradingmember being movable into and out of abrading engagement with theaforesaid one edge of said bands on the side thereof other than theaforesaid one side.

2. The combination with a base frame, first and second parallel spacedapart rotatable drums carried by said frame, at least one of said drumshaving a non-rotating hub, a bearing between said hub and the remainderof said one drum, a stub-shaft-receiving socket formed in said hub, astub shaft in supported association with said base frame, said stubshaft being received in removable relationship in said socket, endlessslicing bands turning on and reaching between said first and seconddrums, said slicing bands each having a cutting edge and said slicingbands each having first and second reaches both of which extend from aposition in contact with and tangent to said first drum to a position incontact with and tangent to said second drum, said endless bandstherefor constituting a series of loops in surrounding relationship witheach of said rolls, of: a first sharpener assembly including a sharpenercarriage, means mounting said sharpener carriage on said base frame forreciprocation in a given direction transversely of said bands and foroscillation in planes normal to said direction, said given directionbeing parallel to the axes of said drums, a cylindrical abrading memberrotatably mounted on said sharpener carriage for reciprocation andoscillation bodily therewith and for rotation relative thereto about anaxis parallel to said given direction, said oscillatory motion of saidabrading member bodily with said sharpener carriage accomplishingmovement of said abrading member into and out of engagement with oneside of one edge of said bands, reciprocating-drive-linkage means forreciprocating said sharpener carriage, motor means in drivingassociation with said cylindrical abrading member for powering therotation thereof relative to said sharpener carriage and in drivingassociation with said carriagereciprocating linkage means for actuationthereof, said means mounting said sharpener carriage on said base framecomprising a shaft extending parallel to the axes of said drums andextending through said loops whereby said loops are in surroundingrelationship with said shaft and said sharpener carriage carriedthereon, first and second bracket members at opposite ends of said shaftfor tying said shaft to said base frame, one of said first and secondbracket members tying its associated and of said shaft to said baseframe solely through said hub whereby upon removal of said stub shaftfrom said stub-shaft-receiving socket of said hub said blades may beremoved from said rolls Without demounting of said bracket members,shaft and sharpener carriage, a second sharpener assembly including asecond sharpener carriage, second mounting means mounting said secondsharpener carriage on said base frame for reciprocation in said givendirection transversely of said bands and for oscillation in planesnormal to said direction, a second cylindrical abrading member rotatablymounted on said second sharpener carriage for reciprocation andoscillation bodily therewith and for rotation relative thereto about anaxis parallel to said given direction, said oscillatory motion of saidsecond abrading member bodily with said second sharpener carriageaccomplishing movement of said second abrading member into and out ofabrading engagement with the aforesaid one edge of said bands on theside thereof other than the aforesaid one side, secondreciprocating-drive-linkage means for reciprocating said secondsharpener carriage, second motor means in driving association with saidsecond cylindrical abrading member for powering the rotation thereofrelative to said second sharpener carriage and in driving associationwith said second carriage-reciprocating linkage means for actuationthereof, said second mounting means comprising a second shaft extendingparallel to the axes of said drums and extending exteriorly to saidloops whereby said loops are in excluding relationship with said secondshaft and said second sharpener carriage carried thereon, third andfourth bracket members at opposite ends of said second shaft for tyingsaid second shaft to said base frame.

3. The combination with a base frame, first and second parallel spacedapart rotatable drums carried by said frame, at least one of said drumshaving a non-rotating hub, a bearing between said hub and the remainderof said one drum, a stub-shaft-receiving socket formed in said hub, astub shaft in supported association with said base frame, said stubshaft being received in removable relationship in said socket, endlessslicing bands turning on and reaching between said first and seconddrums, said slicing bands each having a cutting edge and said slicingbands each having first and second reaches both of which extend from aposition in contact with and tangent to said first drum to a position incontact with and tangent to said second drum, said endless bandstherefor constituting a series of loops in surrounding relationship witheach of said rolls, of: a first sharpener assembly including a sharpener carriage, means mounting said sharpener carriage on said base framefor reciprocation in a given direction transversely of said bands andfor oscillation in planes normal to said direction, said given directionbeing parallel to the axes of said drums, a cylindrical abrading memberrotatably mounted on said sharpener carriage for reciprocation andoscillation bodily therewith and for rotation relative thereto about anaxis parallel to said given direction, said oscillatory motion of saidabrading member bodily with said sharpener carriage accomplishingmovement of said abrading member into and out'of engagement with oneside of one edge of said bands, reciprocating-drive-linkage means forreciprocatingaid sharpener carriage, motor means in driving associationwith said cylindrical abrading member for powering the rotation thereofrelative to said sharpener carriage and in driving association with saidcarriage-reciprocating linkage means for actuation thereof, cammingmeans for imposing said oscillatory motion of said abrading member. as afunction of the reciprocatory motion of said abrading member with saidabrading member being in bladedisengaging oscillatory position at atleast one point in its reciprocatory travel and in blade-engagingoscillatory position throughout a major portion of its reciprocatorytravel, said means mounting said sharpener carriage on said base framecomprising a shaft extending parallel to the axes of said drums andextending through said loops whereby said loops are in surroundingrelationship with said shaft and said sharpener carriage carriedthereon, first and second bracket members at opposite ends of said shaftfor tying said shaft to said base frame, one of said first and secondbracket members tying its associated end; of said shaft to said baseframe solely through said hub whereby upon removal of said stub shaftfrom said stubshaft-receiving socket of said hub said blades may beremoved from said rolls without demounting of said bracket members,shaft and sharpener carriage, and a second sharpener assembly includinga second cylindrical abrading member with which said loops are inexcluding relationship, said second abrading member being movable intoand out of abrading engagement with the aforesaid one edge of said bandson the side thereof other than the aforesaid one side.

4. The combination with a base frame, first and second: parallel spacedapart rotatable drums carried by said frame, at least one of said drumshaving a non-rotating hub, a bearing between said hub and the remainderof said one drum, a stub-shaft-receiving socket formed in.

said hub, a stub shaft in supported association with said. base frame,said stub shaft being received in removable relationship in said socket,endless slicing bands turning. on and reaching between said first andsecond drums, said slicing bands each having a cutting edge and saidslicing bands each having first and second reaches both of which.

extend from a position in contact with and tangentto said first drum toa position in contact with and tangent to said second drum, said endlessbands therefor consti tuting a series of loops in surroundingrelationship with.

each of said rolls, of: a first sharpener assembly includ ing asharpenercarriage, means mounting said sharpenercarriage on said base frame forreciprocation in a given direction transversely of said bands and foroscillation in planes normal to saiddirection, said parallel to the axesof said drums, a

direction, said oscillatory motion of bodily with said sharpenercarriage ment of said abrading member into and out of engagement withone side of one edge of said bands, reciprocating-- drive-linkage meansfor reciprocating said sharpener carriage, motor means in drivingassociation with said cylindrical abrading member for powering therotation thereof;

given direction beingcylindrical abrading; member rotatably mounted onsaid sharpener carriage for reciprocation and oscillation bodilytherewith and for. rotation relative thereto about an axis parallel tosaid given. said abrading member. accomplishing moveabrading memberwith.

carriage on said'base frame comprising 'a shaft extending parallel tothe axes of said drums and extending throughsaid loops whereby saidloops are in surrounding rela-'' tionship with said shaft and saidsharpener carriage carried thereon, first and second bracket members atopposite ends of said shaft for tying said shaft to said base frame, oneof said first and second brac'et members tying its associated end ofsaid shaft to said base frame solely through said hub whereby uponremoval of said stub shaft from said stub-shaft-receiving socket of saidhub said blades may be removed from rolls without demounting of saidbracket members, shaft and sharpener carriage, and. a second sharpenerassembly including a second cylindri-r. cal abrading member with whichsaid loops are in exclud-i ing relationship, said second abrading memberbeing mov-. able into and out of abrading engagement with the aforeesaid one edge of said bands on the side thereof other than the aforesaidone side. :v

5. The combination with a base frame, first and secondparallel,spaced-apart drums rotatably mounted on said base frame, and endlessslicing bands turning on and reaching between said first and seconddrums, said slicing bands each having a cutting edge and said slicingbands each having first and second reaches both of which. extend from aposition in contact with and tangent to said first drum to a position incontact with and tangent. to said second drum, of: a sharpener carriage,means moun: ing said sharpener carriage on said base frame forrecipro-t, cation in a given direction transversely of said bands and.for oscillation in planes normal to said direction, said given directionbeing parallel to the axes of said drums; a cylindrical abrading memberrotatably mounted on. said sharpener carriage for reciprocation andoscillation bodily therewith and for rotation relative thereto about; anaxis parallel to said given direction, said oscillatory; motion of saidabrading member bodily with said sharp-:1 ener carriage accomplishingmovement of said abrading member into and out of engagement with oneside ofone. edge ofsaidbands, linkage means for reciprocating said,sharpener carriage, motor means in drivingassociationwith saidcylindrical rotation thereof relative to said sharpener carriage and, indriving association with said carriage-reciprocating link-- age meansfor actuation thereof, camming means for im--.

posing said oscillatory motion of said abrading member as a function ofthe reciprocatory motion of said abrading-- member with said abradingmember being in blade-disengaging oscillatory position at at least onepoint in its reciprocatory travel and in blade-engaging oscillatoryposition throughout a major portion of its reciprocatory thereof otherthan the aforesaid one side.

6. The combination with base frame, and endless slicing bands turning onand said sharpener carriage given direction being parallel a cylindricalabrading member carriage accomplishing movement abrading member forpowering the.

said second abrading mem-, out of abrading engagement with the aforesaidone edge of said bands on the sidea base frame, first and secondparallel, spaced-apart drums rotatably mounted on said V and seconddrums, said slicingj bands each having a cutting edge and said slicingbands;- each having first and second reaches both of which extend from aposition in contact with and tangent to said first drum to a position incontact with and tangent to saidsecond drum, of: a sharpener carriage,means mounting on said base frame for reciproca tion in a givendirection transversely of said bands and for oscillation in planesnormal to said direction, said to the axes of said drums,; rotatablymounted on saidsh-arpener carriage for reciprocation and oscillationbodily therewith and for rotation relative thereto about an; axisparallel to said given direction, said oscillatory mo; tion of saidabrading member bodily with said sharpener; of said abrading'mem herinto and out of engagement with one side of one edge of said bands,linkage means for reciprocating said sharpener carriage, motor means indriving association with said cylindrical abrading member for poweringthe rotation thereof relative to said sharpener carriage and in drivingassociation with said carriage-reciprocating linkage means for actuationthereof, camming means for imposing said oscillatory motion of saidabrading member as a function of the reciprocatory motion of saidabrading member with said abrading member being in bladedisengagingoscillatory position at at least one point in its reciprocatory traveland in blade-engaging oscillatory position throughout a major portion ofits reciprocatory travel, said at least one point at which said abradingmember is in blade-disengaging oscillatory position being at one end ofits reciprocatory travel, and a second sharpener assembly including asecond cylindrical abrading member with which said loops are inexcluding relationship, said second abrading member being movable intoand out of abrading engagement with the aforesaid one edge of said bandson the side thereof other than the aforesaid one side.

7. In endless band bread slicing machines having sharpening meanscombined therewith in which the bands are removable without disassemblyof the slicing machine and without demounting of the sharpening means, abase frame, first and second parallel spaced apart rotatable drumscarried by said frame, at least one of said drums having a non-rotatinghub, a bearing between said hub and the remainder of said one drum, astub-shaft-receiving socket formed in said hub, a stub shaft insupported asso ciation with said base frame, said stub shaft beingreceived in removable relationship in said socket, endless slicing bandsturning on and reaching between said first and second drums, saidslicing bands each having a cutting edge and said slicing bands eachhaving first and second reaches both of which extend from a position incontact with and tangent to said first drum to a position in contactwith and tangent to said second drum, said endless bands thereforconstituting a series of loops in surrounding relationship with each ofsaid rolls, first and second sharpener assemblies including first andsecond cylindrical abrading members each extending parallel to saiddrums, first mounting means mounting said first cylindrical abradingmember for movement into and out of abrading engagement with one side ofone edge of said bands with said loops in surrounding relationship withsaid first abrading member, second mounting means mounting said secondcylindrical abrading member for movement into and out of abradingengagement with the aforesaid one edge of said bands on the side thereofother than the aforesaid one side with said loops in excludingrelationship with said second abrading member, said first and secondmounting means being tied to said base frame with one end of said firstmounting means being tied to said base frame solely through said hub.

8. The combination with a hue frame, first and second parallel spacedapart rotatable drums carried by said frame, at least one of said drumshaving a non-rotating hub, a bearing between said hub and the remainderof said one drum, a stub-shaft-receiving socket formed in said hub, astub shaft in supported association with said base frame, said stubshaft being received in removable relationship in said socket, endlessslicing bands turning on and reaching between said first and seconddrums, said slicing bands each having a cutting edge and said slicingbands each having first and second reaches both of which extend from aposition in contact with and tangent to said first drum to a position incontact with and tangent to said second drum, said endless bandstherefor constituting a series of loops in surrounding relationship witheach of said rolls, of: a first sharpener assembly including a sharpenercarriage, means mounting said sharpener carriage on said base frame forreciprocation in a given direction transversely of said bands and foroscillation in planes normal to said direction, parallel to the axes ofsaid drums, a cylindrical abrading member rotatably mounted on saidsharpener carriage for reciprocation andv oscillation bodily therewithand for rotation relative thereto about an axis parallel to said givendirection, said oscillatory motion of said abrading member bodily withsaid sharpener carriage accomplishing movement of said abrading memberinto and out of ensaid given direction being gagement with one side ofone edge of said bands,

reciprocating-drive-linkage means for reciprocating said sharpenercarriage, motor means in driving association with said cylindricalabrading member for powering the rotation thereof relative to saidsharpener carriage and in driving association with saidcarriage-reciprocating linkage means for actuation thereof, cammingmeans for imposing said oscillatory motion of said abrading member as afunction of the reciprocatory motion of said abrading member with saidabrading member being in bladedisengaging oscillatory position at atleast one point in its reciprocatory travel and in blade-engagingoscillatory position throughout a major portion of its reciprocatorytravel, said at least one point at which said abrading member is inblade-disengaging oscillatory position being at one end of itsreciprocatory travel, said means mounting said sharpener carriage onsaid base frame comprising a shaft extending parallel to the axes ofsaid drums and extending through said loops whereby said loops are insurrounding relationship with said shaft and said sharpener carriagecarried thereon, first and second bracket members at opposite ends ofsaid shaft for tying said shaft to said base frame, one of said firstand second bracket members tying its associated end of said shaft tosaid base frame solely through said hub whereby upon removal of saidstub shaft from said stub-shaft-receiving socket of said hub said bladesmay be removed from rolls without demounting of said bracket members,shaft and sharpener carriage, and a second sharpener assembly includinga second cylindrical abrading member with which said loops are inexcluding relationship, said second abrading member being movable intoand out of abrading engagement with the aforesaid one edge of said bandson the side thereof other than the aforesaid one side, said one of saidfirst and second bracket members including an intermediate arm portionand also including at one end means for receiving said shaft and at saidother end means for receiving said hub, said respective receiving meansbeing displaced from each other with respect to said given direction andalso in a direction normal to said given direction and being joined bysaid intermediate arm portion.

9. The combination with a base frame, first and second parallel spacedapart rotatable drums carried by said frame, at least one of said drumshaving a non-rotating hub, a bearing between said hub and the remainderof said one drum, a stub-shaft-receiving socket formed in said hub, astub shaft in supported association with said base frame, said stubshaft being received in removable relationship in said socket, endlessslicing bands turning on and reaching between said first and seconddrums, said slicing bands each having a cutting edge and said slicingbands each having first and second reaches both of which extend from aposition in contact with and tangent to said first drum to a position incontact with and tangent to said second drum, said endless bandstherefor constituting a series of loops in surrounding relationship witheach of said rolls, of: a first sharpener assembly including a sharpenercarriage, means mounting said sharpener can riage on said base frame forreciprocation in a given direction transversely of said bands and foroscillation in planes normal to said direction, said given directionbeing parallel to the axes of said drums, a cylindrical abrading memberrotatably mounted on said sharpener carriage for reciprocation andoscillation bodily therewith and for rotation relative thereto about anaxis parallel to said given direction, said oscillatory motion of saidabrading member bodily with said sharpener carriage accomplishingmovement of said abrading member into and out of engagement with oneside of one edge of said bands, reciprocating-drive-linkage means forreciprocating said sharpener carriage, motor means in drivingassociation with said cylindrical abrading member for powering therotation thereof relative to said sharpener carriage and in drivingassociation with said carriage-reciprocating linkage means for actuationthereof, camming means for imposing said oscillatory motion of saidabrading member as a function of the reciprocatory motion of saidabrading member with said abrading member being in bladedisengagingoscillatory position at at least one point in its reciprocatory traveland in blade-engaging oscillatory position throughout a major portion ofits reciprocatory travel, said means mounting said sharpener carriage onsaid base frame comprising a shaft extending parallel to the axes ofsaid drums and extending through said loops whereby said loops are insurrounding relationship with said shaft and said sharpener carriagecarried thereon, first and second bracket members at opposite ends ofsaid shaft for tying said shaft to said base frame, one of said firstand second bracket members tying its associated end of said shaft tosaid base frame solely through said hub whereby upon removal of saidstub shaft from said stubshaft-receiving socket of said hub said bladesmay be removed from said rolls without demounting of said bracketmembers, shaft and sharpener carriage, and a second sharpener assemblyincluding a second cylindrical abrading member with which said loops arein excluding relationship, said second abrading member being movableinto and out of abrading engagement with the aforesaid one edge of saidbands on the side thereof other than the aforesaid one side, said one ofsaid first and second bracket members including an intermediate armportion and also including at one end means for receiving said shaft andat said other end means for receiving said hub, said respectivereceiving means being displaced from each other with respect to saidgiven direction and also in a direction normal to said given directionand being joined by said intermediate arm portion.

10. The combination with a base frame, first and second parallel spacedapart rotatable drums carried by said frame, at least one of said drumshaving a non-rotating hub, a bearing between said hub and the remainderof said one drum, a stub-shaft-receiving socket formed in said hub, astub shaft in supported association with said base frame, said stubshaft being received in removable relationship in said socket, endlessslicing bands turning on and reaching between said first and seconddrums, said slicing bands each having a cutting edge and said slicingbands each having first and second reaches both of which extend from aposition in contact with and tangent to said first drum to a position incontact with and tangent to said second drum, said endless bandstherefor constituting a series of loops in surrounding relationship witheach of said rolls, of: a first sharpener assembly including a sharpenercarriage, means mounting said sharpener carriage on said base frame forreciprocation in a given direction transversely of said bands and foroscillation in planes normal to said direction, said given directionbeing parallel to the axes of said drum, a cylindrical abrading memberrotatably mounted on said sharpener carriage for reciprocation andoscillation bodily therewith and for rotation relative thereto about anaxis parallel to said given direction, said oscillatory motion of saidabrading member bodily with said sharpener carriage accomplishin-gmovement of said abrading member into and out of engagement with oneside of one edge of said bands, reciprocating-drive-linkage means forreciprocating said sharpener carriage, motor means in drivingassociation with said cylindrical abrading member for powering therotation thereof relative to said sharpener carriage and in drivingassociation with said carriage-reciprocating linkage means for actuationthereof, said means mounting said sharpener carriage on said base framecomprising a shaft extending parallel to the axes of said drums andextending through said loops whereby said loops are in surroundingrelationship with said shaft and said sharpener carriage carriedthereon, first and second bracket members at opposite ends of said shaftfor tying said shaft to said base frame, one of said first and secondbracket members tying its associated end of said shaft to said baseframe solely through said hub whereby upon removal of said stub shaftfrom said stub-shaft-receiving socket of said hub said blades may beremoved from said rolls without demounting of said bracket members,shaft and sharpener carriage, and a second sharpener assembly includinga second cylindrical abrading member with which said loops are inexcluding relationship, said second abrading member being movable intoand out of abrading engagement with the aforesaid one edge of said bandson the side thereof other than the aforesaid one side, said one of saidfirst and second bracket members including an intermediate arm portionand also including at one end means for receiving said shaft and at saidother end means for receiving said hub, said respective receiving meansbeing displaced from each other with respect to said given direction andalso in a direction normal to said given direction and being joined bysaid intermediate arm portion.

No references cited.

